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Question-1
The angular momentum of a body with mass ( m) moment of inertia ( I ) and angular velocity ( ω ) rad/s is equal to ____.

(A) I_ω	(B) I_ω2
(C) ^I/_ω2	(D) ^I/_ω

Question-2 A round disc of moment of inertia I₂ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I₁ rotating with an angular velocity ω about the same axis. The final angular velocity of the combination of discs is _____.

(A)	(B) ω
(C)	(D)

Question-3 The angular speed of an engine wheel making 90 rev/min is _________.

(A) 1.5 π rad/s	(B)3 π rad/s
(C)4.5 π rad/s	(D)6 π rad/s

Question-4 A weightless ladder 20 ft long rests against a frictionless wall at an angle of 60^o from the horizontal. A 150 pound man is 4 ft from the top of the ladder . A horizontal force needed to keep it form slipping. Choose the correct magnitude of force from the following.?

(A) 17.3 pound	(B)100 pound
(C)120 pound	(D)150 pound

Question-5
A solid homogenous sphere of mass M and radius R is moving on a rough horizontal surface, partially rolling and partially sliding during this kind of motion of the sphere ?

(A) Total Kinetic energy is conserved	(B) The angular momentum of the sphere about the point of contact with the plane is conserved
(C) Only the rotational kinetic energy about the centre of mass is conserved	(D) Angular momentum about the centre of mass is conserved

Question-6
A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is k. If radius of the ball be R, then the fraction of total energy associated with its rotational energy will be

(A)	(B)
(C)	(D)

Question-7 A disc is rotating with angular velocity & If a child sits on it, what is conserved ?

(A) Linear momentum	(B)Angular mometum
(C)Kinetic energy	(D)Moment of inertia

Question-8
A solid sphere and a hollow sphere are thrown horizontally from a cliff with equal velocities, respectively. Then which sphere reaches first on earth ?

(A) Solid sphere	(B)Hollow sphere
(C)Both sphere simultaneously	(D)We cannot say because masses of spheres are not given

Question-9 Angular momentum :

(A) Vector (axial )	(B)Vector ( polar )
(C)Scalar	(D)None of these

Question-10
ABC is a triangular plate of uniform thickness. The sides are in the ratio shown in the figure. I _AB – I _BC and I _CA are the moments of inertia of the plate about AB, BC and CA as axes respectively. Which one of the following relations is correct ?

(A) I _AB > I_BC	(B) I_BC > I _AC
(C) I _AB + I _BC = I_CA	(D) I _CA is maximum

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Plus 1 Biology Science

CBSE

Practice in Related Chapters
Units and Measurements
Motion in a Straight Line
Laws of Motion
Mechanical Properties of Solids
Motion in a Plane
Waves
Gravitation
Thermodynamics
Thermal Properties of Matter
Work,Energy and Power
Kinetic Theory
System of Particles and Rotational Motion
Oscillations
Mechanical Properties of Fluids

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